The polarity of the induced emf is such that it produces a current whose magnetic field opposes the change that produces it. The induced magnetic field inside any loop of wire always acts to keep the magnetic flux in the loop constant. This inherent behavior of generated magnetic fields is summarized in Lenz's Law.he polarity of the induced emf is such that it produces a current whose magnetic field opposes the change that produces it. The induced magnetic field inside any loop of wire always acts to keep the magnetic flux in the loop constant. This inherent behavior of generated magnetic fields is summarized in Lenz's Law.
When gross profit ratio is expressed in percentage form, it is known as gross profit margin or gross profit percentage. The basic components of the formula of gross profit ratio (GP ratio) are gross profit and net sales. Gross profit is equal to net sales minus cost of goods sold.
Net profit is equal to the gross profit minus overheads minus interest payable plus one off items for a given time period. Gross Margin vs Net Margin Gross margin is the ratio of gross profit to revenue. Net margin is the ratio of net profit to revenue. Gross is the profit from the transaction without deduction.